Select the appropriate meaning of the given idiom.
At the drop of a hat

Correct option is D

Option (d) is the correct meaning of the given idiom.
At the drop of a hat: To do something immediately or without hesitation. (Hindi: ज़रा सी बात पर, बिना किसी झिझक के)
Example: He’s ready to help anyone at the drop of a hat.
Other related idioms and their meanings:
· In a heartbeat – instantly.
· In the blink of an eye – very quickly.
· Without a second thought – without hesitation.